Question

I'm trying to factor this equation and I just can't manage to do it.

9 sin^2 x - 6 sin x - 1 = 0

I tried to do (3 sin x + 1) (3 sin x - 1) = 0, but it doesn't work.

Thank you a lot!

Answer 1

use quadratic formula

Answer 2

t=sinx

9t^2 - 6t - 1 = 0

Answer 3

Oh. Okay, thanks :)